Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Property and casualty insurance premiums	$ 8,286	$ 7,959
Life premiums and contract charges	616	593
Other revenue	216	210
Net investment income	786	748
Realized capital gains and losses:
Total other-than-temporary impairment (“OTTI”) losses	0	(62)
OTTI losses reclassified (from) to other comprehensive income	(1)	3
Net OTTI losses recognized in earnings	(1)	(59)
Sales and valuation changes on equity investments and derivatives	(133)	193
Total realized capital gains and losses	(134)	134
Total revenues	9,770	9,644
Costs and expenses
Property and casualty insurance claims and claims expense	5,149	5,416
Life contract benefits	504	474
Interest credited to contractholder funds	161	173
Amortization of deferred policy acquisition costs	1,273	1,169
Operating costs and expenses	1,355	1,307
Restructuring and related charges	22	10
Interest expense	83	85
Costs and expenses	8,547	8,634
Gain on disposition of operations	1	2
Income from operations before income tax expense	1,224	1,012
Income tax expense	249	317
Net income	975	695
Preferred stock dividends	29	29
Net income applicable to common shareholders	$ 946	$ 666
Earnings per common share:
Net income available to common shareholders per common share - Basic (in dollars per share)	$ 2.67	$ 1.82
Weighted average common shares - Basic (in shares)	354.1	365.7
Net income available to common shareholders per common share - Diluted (in dollars per share)	$ 2.63	$ 1.79
Weighted average common shares - Diluted (in shares)	359.9	371.3
Cash dividends declared per common share (in dollars per share)	$ 0.46	$ 0.37